determine the overall heat transfer coefficient of a condenser formed of copper pipe when the fluid-side heat-transfer coefficient is 2000 W/m². °C and the heat-transfer coefficient on the refrigerant side is 1200 W/m². °C. The pipe has an outside diameter of 25.4 mm and an inside diameter of 19.8 mm. The thermal conductivity of steel is (410) W/m-°C.

determine the overall heat transfer coefficient of a condenser formed of copper pipe when the fluid-side heat-transfer coefficient is 2000 W/m². °C and the heat-transfer coefficient on the refrigerant side is 1200 W/m². °C. The pipe has an outside diameter of 25.4 mm and an inside diameter of 19.8 mm. The thermal conductivity of steel is (410) W/m-°C.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.20P

See similar textbooks

Similar questions

Explain why a waterless, earth-coupled, closed-loop geo-thermal heat pump system is more efficient than a conventional closed-loop geothermal heat pump system.
The subcooling temperature in a condenser can be measured by taking the difference between the A. suction pressure converted to temperature and the boiling refrigerant. B. boiling temperature and the condensing temperature. C. condensing temperature and the leaving-refrigerant temperature. D). condensing temperature and the entering-refrigerant temperature.
The condenser of a room air conditioner is designedto reject heat at a rate of 15,000 kJ/h from refrigerant-134aas the refrigerant is condensed at a temperature of 408C. Air(cp 5 1005 J/kg?K) flows across the finned condenser coils,entering at 258C and leaving at 358C. If the overall heat transfer coefficient based on the refrigerant side is 150 W/m2?K,determine the heat transfer area on the refrigerant side.
Why are HENs (Heat exchangers networks) much more challenging to design with just a single equipment unit?
A two pass steam surface condenser is to be designed to condense 10000 kg/hr of steam having an enthalpy of 2240 kj/kg. Condenser pressure is 13.79 kpa. circulating water enters the condenser at 25 C and leaves at 40 C. the outside and inside diameter for a water tube, OD=20 mm, ID = 17 mm and water velocity of 3 m/s. if the overall coefficient of the heat transfer is 14100 kj/hr-m-C of outside tube surface, determine the amount of circulating water in m/hr.
A double pass water-cooled shell-and-tube type condenser has a total number of tubes equal to 42. The tubes are of 14 mm inside diameter, 16 mm outside diameter and 4 m length. The overall heat transfer coefficient is 3510 kJ/hr-m2 -°C. Cooling water enters the condenser at 25°C at a velocity of 1.5 m/s and leaves with a temperature rise of 6.5°C. (a) Calculate the outside heating surface area of the tubes in m2 ; (b) Determine the mass flow rate of water in kg/s and the volumetric flow rate in L/s (using an average density of 996.5 kg/m3 ); (c) Estimate the condensing temperature of the refrigerant; (d) If the ammonia refrigerant enters and leaves the condenser at saturation conditions, compute the mass flow rate of the refrigerant and the condenser pressure in kPa.
The food storage room requires a refrigeration system with a capacity of 15 tons of refrigeration which operates at an evaporator temperature of -17.5 ° C and a condenser temperature of 37.0 ° C. The refrigerant used is R-134a and the system operates at saturated conditions. A. COP = Answer. b. Refrigerant flow rate = Answerkg / s. c. Heat loss rate in condenser = AnswerkJ / sec.
An ice plant of 200 tons refrigeration capacity makes use of the shelland tube superheat remover. The temperature of discharge is 112 OCand vapor is cooled to 52 OC. Water enters at 24 OC and is heatedduring the counterflow with the vapor to 70 OC. The compressoroperates at 1352.2 kPaa condenser pressure and 247.14 kPaaevaporating pressure. The overall coefficient of heat transfer is 390kJ/hr-m2-C. Calculate the LMTD.
Steam is to be condensed on the shell side of a 1-shell-pass and 8-tube-passes condenser, with 50 tubes in each pass, at 30°C (hfg = 2431 kJ/kg). Cooling water (cp = 4180 J/kg·K) enters the tubes at 15°C at a rate of 1800 kg/h. The tubes are thin-walled, and have a diameter of 1.5 cm and length of 2 m per pass. If the overall heat transfer coefficient is 3000 W/m2·K, determine (a) the rate of heat transfer and (b) the rate of condensation of steam.
A straight-condensing 10,000 kW turbine has a guaranteed steam rate of 5.90 kg/kW.hr when exhausting at 5.0 kPa. Exhaust steam enters the condenser at 92% quality, and it is estimated that fouling will decrease the overall coefficient by 30% during operation. Cooling water is available at 18 ℃, and for design purposes, 1 ½ in OD 16 BWG Brass tubes (thickness = 0.065 in, k=62 BTU/hrftF°.) are specified with 9 C° rise in cooling water, which circulates at 5 ft/s. Inside and outside film coefficients are hi=960 and ho=1474 BTU/hrft2F°. Design a condenser for this turbine, considering tube and boundary resistance as flat surfaces and neglecting any crossflow factor. Determine the followinga) Effective overall coefficient of heat transferb) Volume flow rate of cooling waterc) Number of tubes for single passd) Length of tubes
The food storage room requires storage of a cooling system with a capacity of 10 tons of refrigeration which operates at an evaporator temperature of -9.2 ° C and a condenser temperature of 28.6 ° C. The refrigerant used is R-134 and the system operates in saturated conditions. Determine: a. COP = b. Refrigerant flow rate = ...kg / s. c. Heat loss rate in the condenser... kJ / s.
A food storage chamber requires a refrigeration system of 15 ton capacity operating at an evaporator temperature of -25.2 deg C and a condenser tempreature of 35.8 deg C. Refrigerant (R-717) is used and the system operates under saturated conditions. Determine: a.) C.O.P. b.) Refrigerant flow rate c.) Rate of heat flow removed by condense